running like crap - co2?
My check engine light came on, and then went off about a day later, but my car is running like crap - idling a bit high at lights, and warming up load, sluggish and with uneven distribution of exhaust. My owner's manual says that the check engine light means exhaust problems, and have investigated it a bit on here, but not sure what to do, as I dont know what an 02 sensor is or what it does. Cany anyone help? Thanks